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Flights from Manassas to Islip

There are no flights available between Manassas and Islip. See below for nearby flight options from Washington D.C. to Islip.

      • DCA 08:19
        14h 25m
        1 stop
        ISP 22:44
        Washington D.C. - Islip | Wed, Dec 17 | American Airlines
        ISP 18:40
        26h 50m
        1 stop
        DCA 21:30
        Islip - Washington D.C. | Sat, Dec 20 | Frontier Airlines
        PHP 19,180 PHP 51,324
        63% OFF
        63% OFF
        PHP 51,324 PHP 19,180
      • DCA 11:00
        11h 44m
        1 stop
        ISP 22:44
        Washington D.C. - Islip | Wed, Dec 17 | Jetblue Airways
        ISP 18:40
        16h 32m
        1 stop
        DCA 11:12
        Islip - Washington D.C. | Sat, Dec 20 | Frontier Airlines
        PHP 19,615 PHP 51,324
        62% OFF
        62% OFF
        PHP 51,324 PHP 19,615
      • DCA 10:45
        24h 50m
        1 stop
        ISP 11:35
        Washington D.C. - Islip | Fri, Jan 16 | Jetblue Airways
        ISP 12:25
        10h 6m
        1 stop
        DCA 22:31
        Islip - Washington D.C. | Mon, Jan 19 | Jetblue Airways
        PHP 28,523 PHP 51,324
        44% OFF
        44% OFF
        PHP 51,324 PHP 28,523
      • DCA 18:15
        18h 54m
        1 stop
        ISP 13:09
        Washington D.C. - Islip | Sun, Dec 28 | Jetblue Airways
        ISP 20:35
        24h 36m
        1 stop
        DCA 21:11
        Islip - Washington D.C. | Sun, Jan 4 | Frontier Airlines
        PHP 32,156
        37% OFF
        PHP 51,324 PHP 32,156
      • IAD 12:42
        10h 2m
        1 stop
        ISP 22:44
        Washington D.C. - Islip | Wed, Dec 17 | United Airlines
        ISP 18:40
        23h 45m
        1 stop
        IAD 18:25
        Islip - Washington D.C. | Sat, Dec 20 | Frontier Airlines
        PHP 32,684
        36% OFF
        PHP 51,324 PHP 32,684
      • DCA 18:15
        15h 46m
        1 stop
        ISP 10:01
        Washington D.C. - Islip | Mon, Dec 29 | Jetblue Airways
        ISP 07:30
        8h 19m
        1 stop
        DCA 15:49
        Islip - Washington D.C. | Fri, Jan 2 | Cape Air
        PHP 36,459
        28% OFF
        PHP 51,324 PHP 36,459
      • IAD 22:15
        14h 54m
        1 stop
        ISP 13:09
        Washington D.C. - Islip | Sun, Dec 28 | United Airlines
        ISP 20:35
        14h 35m
        1 stop
        IAD 11:10
        Islip - Washington D.C. | Sun, Jan 4 | Frontier Airlines
        PHP 37,707
        27% OFF
        PHP 51,324 PHP 37,707
      • IAD 10:43
        13h 16m
        1 stop
        ISP 23:59
        Washington D.C. - Islip | Fri, Dec 19 | Frontier Airlines
        ISP 12:20
        8h 43m
        1 stop
        IAD 21:03
        Islip - Washington D.C. | Tue, Dec 23 | Frontier Airlines
        PHP 41,901
        18% OFF
        PHP 51,324 PHP 41,901
      • IAD 22:12
        12h 52m
        1 stop
        ISP 11:04
        Washington D.C. - Islip | Fri, Jan 16 | United Airlines
        ISP 09:59
        25h 17m
        1 stop
        IAD 11:16
        Islip - Washington D.C. | Mon, Jan 19 | Cape Air
        PHP 42,905
        16% OFF
        PHP 51,324 PHP 42,905
      • DCA 19:40
        15h 24m
        1 stop
        ISP 11:04
        Washington D.C. - Islip | Fri, Dec 26 | Delta Air Lines
        ISP 07:30
        6h 53m
        1 stop
        DCA 14:23
        Islip - Washington D.C. | Mon, Dec 29 | Cape Air
        PHP 43,625
        15% OFF
        PHP 51,324 PHP 43,625
      • WAS 13:00
        17h 25m
        1 stop
        ISP Invalid Date
        Washington D.C. - Islip | Wed, Dec 17 | Normal Airline
        ISP 15:00
        6h
        Direct
        WAS 16:00
        Islip - Washington D.C. | Fri, Dec 19 | Normal Airline
        Find More Flights
        Find More Flights
      • DCA 09:00
        10h 34m
        1 stop
        ISP 19:34
        Washington D.C. - Islip | Tue, Dec 16 | Jetblue Airways
        PHP 5,777 PHP 10,332
        44% OFF
        44% OFF
        PHP 10,332 PHP 5,777
      • IAD 20:53
        25h 53m
        1 stop
        ISP 22:46
        Washington D.C. - Islip | Fri, Jan 16 | Frontier Airlines
        PHP 5,844 PHP 10,332
        43% OFF
        43% OFF
        PHP 10,332 PHP 5,844
      • IAD 09:26
        14h 33m
        1 stop
        ISP 23:59
        Washington D.C. - Islip | Mon, Dec 15 | Frontier Airlines
        PHP 6,698 PHP 10,332
        35% OFF
        35% OFF
        PHP 10,332 PHP 6,698
      • IAD 21:58
        18h 39m
        1 stop
        ISP 16:37
        Washington D.C. - Islip | Tue, Dec 23 | Frontier Airlines
        PHP 7,108
        31% OFF
        PHP 10,332 PHP 7,108
      • IAD 09:43
        23h 12m
        1 stop
        ISP 08:55
        Washington D.C. - Islip | Sat, Jan 10 | Frontier Airlines
        PHP 7,493
        27% OFF
        PHP 10,332 PHP 7,493
      • IAD 08:30
        11h 4m
        1 stop
        ISP 19:34
        Washington D.C. - Islip | Tue, Dec 16 | United Airlines
        PHP 7,753
        25% OFF
        PHP 10,332 PHP 7,753
      • DCA 06:59
        13h 10m
        1 stop
        ISP 20:09
        Washington D.C. - Islip | Fri, Jan 16 | Delta Air Lines
        PHP 8,037
        22% OFF
        PHP 10,332 PHP 8,037
      • IAD 22:15
        24h 31m
        1 stop
        ISP 22:46
        Washington D.C. - Islip | Fri, Jan 16 | United Airlines
        PHP 8,071
        22% OFF
        PHP 10,332 PHP 8,071
      • DCA 09:50
        22h 50m
        1 stop
        ISP 08:40
        Washington D.C. - Islip | Sat, Jan 24 | Jetblue Airways
        PHP 8,473
        18% OFF
        PHP 10,332 PHP 8,473
      • DCA 09:45
        23h 10m
        1 stop
        ISP 08:55
        Washington D.C. - Islip | Tue, Jan 20 | Jetblue Airways
        PHP 8,782
        15% OFF
        PHP 10,332 PHP 8,782
      • WAS 13:00
        17h 25m
        1 stop
        ISP Invalid Date
        Washington D.C. - Islip | Wed, Dec 17 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Manassas to Islip are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Manassas to Islip

Check flight details from Washington D.C. to Islip: distance, average duration, and cheapest month to plan your trip from Manassas to Islip.

Cheapest one-way flight pricePHP 5,777
Cheapest round-trip ticket pricePHP 19,180
Off-season for travelSeptember
Peak season for travelJuly
Flight distance397.38 km

Find the best time to fly from Manassas to Islip

Check price trends for flights from Washington D.C. to Islip to find the cheapest month to travel from Manassas to Islip.

Cheapest flights
From price
Search
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
  • 18
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Manassas to Islip, calculated over the upcoming 10 weeks.

Flight FAQs

FAQs about flights from Manassas to Islip (no local airports)

  • What are the cheapest flights from Washington D.C. to Islip (WAS-ISP)?

    Based on Trip.com data, Jetblue Airways offers one-way fares as low as PHP 5,777 on Cheapest nonstop routes (e.g. DCA to ISP on Tue, Dec 16), while American Airlines offers Cheapest nonstop round-trips from PHP 19,180 departing on Wed, Dec 17 and returning on Sat, Dec 20.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to Islip is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Washington D.C. to Islip, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Dec 16, with one-way flights priced at just PHP 5,777.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Jetblue Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Islip travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Washington D.C. to Islip is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Washington D.C. to Islip on December 17, 2025 with American Airlines, with prices starting at PHP 19,179.
  • The time difference between Islip and Washington D.C. is 0h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.